Concrete form



June 5, 1923.

W. J. PEDERSEN CONCRETE FORM rig n Filed Sept. 20, 1920 2 Sheets-Sheet lMam m m 1. U A L 0 d mm M M m WITNESSES FM): v, "I?

June 5, 1923. 1,457,999 w. 1. PEDERSEN CONCRETE FORM Original FiledSept. 20, 1920 Sheets-Sheet 2 E'.11' EFT/Wig WITNESSES \A/ALDEMAA(JUL/U3 ECDEES l1 TTORIVE Y S same tame a, teas. I

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NEXUS PEDEEBEH, @E' FLQJMIL PARK, NEW .YGE'EK.

CQNGEETE FQW.

Application filed as ume: to, me, semi To all whom it may concern:

Be it known that l, WAIDEMAR Jones ,PEoERsEN, a citizen of the UnitedStates, and a resident of Floral Park, in the county of Nassau and Stateof New York, have invented a new and Improved Concrete Form, of whichthe following is a full, clear, and exact description.

This invention relates to a method and apparatus for molding and formingcementitious material into units for building purposes.

An object of the invention is the provision of a method for forming aplurality of sections of cementitious material in a simple and readymanner so that they may be quickly assembled into a plurality of formsfor building purposes.

Another object is the provision of a method in which a minimum amount oftime and labor need be expended to achieve the desired results.

A further object is to provide a method in which the operator thereofneed have only a minimum amount of experience or skill in handling andmani ulating these forms.

A still further ob ect is to provide a form for cementitious materialwhich is capable of adjustment in such manner as to result in theformation of cementitious units adaptable when assembled to form aplurality of building structures, such as colums, posts,

- stairways, etc.

Another object resides in the provision of the particular arrangementand construction of parts as will be apparent from a consideration ofthe following description and claims taken in connection with thedrawings.

In the process of building structures of various forms from cementitiousmaterial, the formation of molds for the material involves a greatexpenditure of time and labor and requires a high degree of experienceand skill in the construction and operation of the molds. Most forms andmolds require to be set in places where the building structure is to befinally located, and are, in most cases, useless after having once beenused. My invention aims to eliminate these disadvantages, and otherswhich will be apparent hereinafter, and to that end comprises a form ormold which is capable of assembly in any suitable location and can bequickly assembled and dismantled. It is in herently capable of readyadjustment for We. times. fienewefl April aa-reae.

the purpose of forming molds of difierent dimensions and difierentshapes, and, from itsconstruction and operation, cementitious units canbe formed from which columns, posts, Stairways and other similarstructures may finally result.

In general, the invention comprises the formation of a plurality ofsections of cementitious material adjacent each other on a flat plane orplatform with a connection extendlng between adjacent faces of thesectlons, and when this unit is set the sections are removed from theform and bent with respect to each other to make the desired buildingstructure. The particular embodiment of the invention shown will beapparent from the description and claims hereinafter Set forth in viewof the drawings.

The invention is illustrated in the drawings, of which- Flgure 1 is aplan view of the form with a portion of the cementitious material in PP;

Figure 2 is a longitudinal section taken on the line 2-2 of Figure l;

Figure 3 is a partial perspective view of K a modified portion of theform;

Figure 4 is a detail view of part of a form;

Flgure 5 is an enlarged section of a modified form;

Figure 6 is a section taken on the line of Figure 5;

Figure 7 is a section taken on the line 7-7 of Figure 6 and shownenlarged;

Flgure 8 is a partial perspective view of a plurality of sections aboutto be formed into a desired unitary structure;

F1gure 9 is a perspective view of a chimp ey formed in accordance withmy invenion;

Figure 10 is a sectional view of a form adapted for the manufacture ofStairways; an

Figure 11 is a partial sectional view of a stairway formed in the mold,as shown in Figure 10.

As shown in the drawings, the invention is set forth as embodied in amold or form for constructing columns, posts, chimneys and Stairways,although various other structures may be made by the use of this form ina slightly diii'erent manner without such change in its construction andoperation as would depart from the spirit of the invention.

As shown in Figures 1 and 2, one form of mold comprises a pair ofU-shaped metal bars 1 and 2 set on end with the bases of the U barsfacin each other. Extending across between the iars 1 and 2 are aplurality of V-shaped metallic plates 3 so arranged that the apex of theV is disposed upwardly and the outer ends of the limbs of the V rest onthe bottoms of the bars 1 and 2. This structure may be disposed on anysuitable platform and in any desired location separate from the placewhere the building structure to be formed is to 'be ultimately disposed.A mesh 4 of any suitable material, such as wire, is placed over theplates 3 to form a re-enforcing agent for the cementitious unlt as wellas an integral connection extending between separate sections. This mesh4 is shown as an integral fabric extending from one end of the unit tothe other, but it may not be integral but be formed in sections,provided the mesh is always disposed so as to extend between the facesof adjacent sections. A pluralit of fiat bars 5 are arranged to extendetween the bars 1 and 2 directly over the apex of the V plates 3. Thecementitious material 6 is then poured into this form until its levelreaches the top of the flat bars 5.

Upon consideration of Figure 2, it will be seen that the material 6extends from the bottom of the U bars 1 and 2 up to the levelcorresponding to the to of the flat bars 5 and is divided into a purality of sections which are separated from each other by the V bars 12and the flat bars 5, the only connection between the various sectionsbeing the mesh fabric 4 which extends between each section. As mentionedabove, this fabric may be an integral fabric extending through the wholeunit or may merely be a lurality of small sections of fabric, providedeach section of fabric extends between the edges of adjacent sections.This fabric forms a connection to the sections which would otherwise beentirely separate. The V plates 3 and the flat bars 5 ma extend beyondpanel bars 1 and 2 and so oing extend through triangular apertures 7 andrectangular apertures 8, respectively, in the bars 1 and 2. The verticaldistance between the apertues 7 and 8 may be arranged to accommodate thedifferent thicknesses of fabric. Similarly, the longitudinal distancesbetween the apertures 7 and 8 may be disposed to provide units ofvarious widths.

imilarly, the length of each unit and section can be adjusted by movingthe U bars 1 and 2 further apart, the plates 3 and the bars 5 slidinginto apertures of the U bars during their movement. Therefore, it isreadily perceived that this form is capable of adjustment inconstruction to suit any requirement with comparative case.

In Figure 3 a wooden bar 9 is shown having in one face apertures 10 andslots 11,

Mamet corres onding to the apertures 7 and 8 above descri ed except thatthe apertures 10 and 11 do not extend through the bar 9. This sort ofbar 9 is used when a definite sized unit is required, since the plate 3and bars 5 when used with this bar 9 cannot be adjusted longitudinallytherein.

In Figure 4; one of the V-shaped bars, de noted 12, is shown. It will beobserved that the angle between thelimbs of the V is 90. This angle ispreferable when structures such as single columns or posts or stairwaysare to be produced, where the angles between the adjacent faces are 90angles. Of course, it is understood that any other desired angle may beused than the one shown.

11 Figure 5 a U bar is shown which, along its lower edge, is providedwith V bars 12 and bars 14 spaced a definite distance apart in themanner above described. After a plurality of cementitious units areformed with respect to the. bars and plates on the lower portion of theU bar, a covering of wood or other suitable material, such as 14', maybe placed over this unit, and another unit maybe formed above thissupport or platform. This unit can be, formed by reason of theconstruction of the U bar with another plurality of plates 13 and bars15, which may be disposed apart at different distances than the distancebetween the bars and plates in the lower level of the U bar. Thisprovides means whereby two units of different dimensions may be formed,using the one set of U bars.

In Figure 6 is shown a modification of the structure which isparticularly adaptable for cementitious units which have considerablelength, on the order of eight or ten feet. In this case, the V bar 12 isprovided at intervals throughout its upper edge with apertures in whichslotted pins 16 are inserted. These pins are provided with spacedvertically projecting limbs 16 and 17 between which a slot is formed andthrough which the flat bars 14 may extend. These limbs 16 and 17,therefore, provide means whereby the bars 14 can be maintained inalignment with the upper edge of the V plates 12 throughout theirlength.

In Figure 8 is shown a plurality of sections 19, 20, 21 and 22 of acementitious unit which has been formed in accordance with theconstruction shown in Figure 2.

When the cementitious unit has become set, it is removed from the formand the various sections are bent with respect to each other to form acolumn or post. The only connection which holds the sections together isthe extension between adjacent faces of the sections of the fabric 4.Therefore, each section can be bent, with respect to an adjacentsection, into the desired form, which in Figure S is a square post. Bcutting out a portion, such as 23, in one e go of one of edges adjacentnewness the sections, such as 19, the ends of the wire, such as 22, maybe joined and tied to similar ends of the abutting sections to tie theunits together.

The fabric may be tied together at intervals throu hout its verticallength or maybe tied togefiier completely throughout its length.

From an examination of Figure 8 it is seen that by providing V .plates,12 with a right angle between the limbs thereof, sections are formedwhich have their lower the corresponding edges of abutting sections andform a right angle therebetween, which, when the sections are bent intoplace, lie fiat against each other and result in a structure or unithaving a rectangular configuration. The spaces, denoted in Figure 8 bynumerals 19, may be filled in with cement or other suitable material toform the corners of the structure.

after the sections have been bent and tied together. i

In Figure 9 is shown a chimney structure made in accordance with theabove-mentioned method and by means of the forms described. This chimneymay be then covered with stucco 32, and a sheet of tin 31 may beembedded along its upper edge, in the c-ementitious material of thechimney, and along its lower edge, connected in any suitable manner withthe roof portion, whereby a tight joint is made between the chimney andthe roof to prevent leakage.

In Figure 10 is shown a modified form of mold in which the adjacentsections are of different dimensions and in which alternate sets of Vbars and flat bars are inverted with respect to each other.

The cementitious material is formed in sections, such as 23, 24, 25 and26, with the fabric 27 extending through the same as a re-enforcingelement and a connection between the sections. These sections areconstructed by the use of V plates and bars, in the manner abovedescribed, and in connection with a plurality of U bars, such as 28.

In Figure 11 is shown the product formed by the bending of the unitconstructed in the mold shown in Figure 10. This product is a stairway,of which the sections 23 and 25 form the steps and the sections 24 and26 form the risers. The steps 23 and 25 being longer than the risers 24and 26 are high, necessitated the modified form of mold shown in Figure10. Furthermore, the fact that sections 23 and 24 are bent with respectto each other in different directions than the sections 25 and 26,necessitated the inversion of successive V bars and flat bars. The openspaces formed after the bending takes place are filled in in the usualmanner with cementitious material.

It is thus apparent that by a broad method, which is capable ofoperation in a simple and 'ready manner by operators not necessarilyexperienced or skilled in this art, I can produce structures of variousforms much more economically than heretofore has been done and with aminimum expenditure of. time. The particular apparatus used in theoperation of this method is exceedingly simple and capable of readyassembly and disassembly, ed to give a wide variationin the dimensionsand forms of the structures produced thereby.

What I claim is:

1. A concrete structure comprising a plurality of separate sectionsdisposed adjacent each other, connections extending between thesections, the portions of abutting faces of adjacent sections beingangularly disposed with respect to each other, and other portions ofabutting faces of the adjacent sections being disposed substantiallyfiat against each other.

2. A cementitious structure comprising a plurality of separate sectionsdisposed adjacent each other, connections between the and can be adjustasections, the portions of abutting faces of adacent sections beingdisposed at right angles to each other, and other portions of abuttingfaces of adjacent sections being disposed substantially flat againsteach other.

3. A concrete structure comprising a plu-v rality of sections disposedadjacent each other, and a re-enforcing element extending between thesections, the abutting faces of adjacent sections on one side of there-enforcing element being disposed angularly with respect to eachother, and the abutting faces of adjacent sections on another side ofthe re-enforcing element being disposed substantially flat with respectto each other.

4. A concrete structure comprising a plurality of sections disposedadjacent each other, are-enforcing element extending between adjacentsections, the abutting faces of the sections on one side of there-enforcing element being disposed at right angles to each other, andthe abutting faces of adjacent sections on the other side of there-inforcing element being disposed substantially flat with respect toeach other.

5. A cementitious structure comprising a plurality of sections disposedadjacent each other, a re-enforcingelement extending between thesections, the abutting faces of alternate adjacent sections on one sideof said re-enforcing element being disposed an gularly with respect toeach other, and the 'abuttingfaces on the other side of the re-enforcingelement between said sections being disposed substantially flat againsteach other.

6. A cementitious' structure comprising a plurality of separate sectionsdisposed adjacent each other, a re-enforcing element extending betweenthe sections, the abutting faces of alternate adjacent sections on oneside of said re enforcingrelement' beingdisposed angularly with respect'to each. other,-

andthe abutting faces on the other'sidemof [the re-enforcin rielementbetween" said sec of spaced, parallel, lon; ;itiu't linal-bar-frames,'-

a plurality of V-sha'ped bars disposed transversely with respect to saidframes, and a.

plurality of flat bars placed over the V-bars, their lower edgescoinciding with the apex line of the V bars. j t 4 .8. A concrete formcomprising a plurality of spaced, parallel channel-bars, a plurality ofinverted- V-shaped' bars disposed transversely with respect to thechannel bars, and a plurality of flat bars disposed over the V- bars,their lower edges disposed in line with the apex line of the V-bars.

' 9. concrete form comprising a plurality it saw 'ofparallelchannelbars, a plu'rality of V-'.

shaped-bars disposed transversely with respect to the channel bars,means on the channel bars "to receivethe'ends of the V bars slidablytherein, a plurality of fiat bars disposed over the V bars, and means onthe channel bars to adjustably receive the flat 10. A concrete formcomprisin a plurality of spaced, parallel frame mem ers, a plurality ofang e bars disposed transversely with respect thereto and forming aplurality of separate sections, a re-enforc'ing element disposed overthe angle bars, a plurality of flat bars disposed over there-enforcingelement and in line with the angle bars, and meanson theangle bars to engage portions of the flat bars to maintain the sam inalignment with the angle bars.

wamrman JULIUS rsnrizsnu.

